<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <p>{{title}}</p>
        <button @click="fun">翻转</button>
    </div>

    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>

    <script>
        const app = new Vue({
            el: '#app',
            data: {
                title: '文字翻转'
            },
            methods: {
                fun() {
                    this.title = this.title.split("").reverse().join("");
                }
            }
        });
    </script>
</body>

</html>